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Toxics Release Inventory (TRI) Program

Toxic Chemical Risk and Health Resources

Many online resources contain valuable information about toxic chemicals; some of these are listed here. 

  • Air Pollution and Health Risk: Find out how we know when a risk from a hazardous substance is serious. Learn how researchers estimate risk, and how the government uses this information to develop regulations that limit our exposure to hazardous substances.
  • CDC's National Environmental Public Health Tracking Network: Find integrated health, exposure, and hazard information and data from a variety of national, state and city sources.
  • EPA's Integrated Risk Information System (IRIS): View EPA human health assessment information for more than 550 chemical substances. The IRIS database contains descriptive and quantitative carcinogenic and non-carcinogenic health risk information.
  • EPA's National Air Toxics Assessment (NATA): View EPA's ongoing comprehensive evaluation of air toxics in the U.S. NATA is a screening tool local, state and tribal agencies can use to prioritize pollutants, emission sources and locations of interest for further study in order to gain a better understanding of risks. The most recent version of NATA is from 2014.
  • Mercury in Your Environment: Learn more about mercury and what is being done to protect your health.
  • Risk Assessment for Toxic Air Pollutants: A Citizen's Guide: Find out about risk assessment, which is the process used to estimate the risk of illness from a specific human exposure to a toxic air pollutant.
  • Tox Town: Interactively learn about commonly-encountered toxic substances, your health and the environment by searching for information about a neighborhood, location or chemical. Tox Town's target audience is students above elementary-school level, educators and the general public. Tox Town also offers some resources in Spanish.